package com.yunmasoft.service.pay.wexin;


import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Properties;

//import com.github.cuter44.nyafx.text.*;
//import com.alibaba.fastjson.*;
//import com.github.cuter44.wxmp.*;

/**
 * 第二步：通过code换取网页授权access_token
 * <br />
 * <a href="http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html#.E7.AC.AC.E4.BA.8C.E6.AD.A5.EF.BC.9A.E9.80.9A.E8.BF.87code.E6.8D.A2.E5.8F.96.E7.BD.91.E9.A1.B5.E6.8E.88.E6.9D.83access_token">ref ↗</a>
 * <br />
 * <pre style="font-size:12px">
 * 参数说明
 * appid       是      公众号的唯一标识
 * secret      是      公众号的appsecret
 * code        是      填写第一步获取的code参数
 * <i>grant_type  是      填写为authorization_code</i>
 * </pre>
 */
public class SnsOAuthAccessToken extends WxmpRequestBase {
    public static final String KEY_APPID = "appid";
    public static final String KEY_SECRET = "secret";
    public static final String KEY_CODE = "code";
    public static final String URL_API_BASE = "https://api.weixin.qq.com/sns/oauth2/access_token";
    // KEYS
    protected static final List<String> KEYS_PARAM = Arrays.asList(
            "appid", "secret", "code", "grant_type"
    );

    // CONSTRUCT
    public SnsOAuthAccessToken(Properties prop) {
        super(prop);

        super.setProperty("grant_type", "authorization_code");

        if (super.getProperty(KEY_SECRET) == null)
            super.setProperty(
                    KEY_SECRET,
                    super.getProperty("SECRET")
            );

        return;
    }

    public SnsOAuthAccessToken(String appid, String secret, String code) {
        super(new Properties());

        super.setProperty(KEY_APPID, appid)
                .setProperty(KEY_SECRET, secret)
                .setProperty(KEY_CODE, code)
                .setProperty("grant_type", "authorization_code");

        return;
    }

    public SnsOAuthAccessToken setAppid(String appid) {
        super.setProperty(KEY_APPID, appid);

        return (this);
    }

    public SnsOAuthAccessToken setSecret(String secret) {
        super.setProperty(KEY_SECRET, secret);

        return (this);
    }

    public SnsOAuthAccessToken setCode(String code) {
        super.setProperty(KEY_CODE, code);

        return (this);
    }


    // BUILD
    @Override
    public SnsOAuthAccessToken build() {
        return (this);
    }

    // TO_URL
    @Override
    public String toURL() {
        throw (
                new UnsupportedOperationException("This request does not execute on client side.")
        );
    }

    // EXECUTE
    @Override
    public SnsOAuthAccessTokenResponse execute()
            throws IOException {
        String url = URL_API_BASE + "?" + super.toQueryString(KEYS_PARAM);

        String respJson = super.executeGet(url);

        return (new SnsOAuthAccessTokenResponse(respJson));
    }
}
